Pocket Botanist
Check these first
- Check if water pools around the base of the tree.
- Smell the soil for a musty or rotten odor.
- Observe if the leaves are dropping while the soil is wet.
Likely causes
Poor soil drainage
PossibleHow to tell: The tree shows stunted growth and yellowing leaves while the soil remains constantly wet. You might notice a sour smell coming from the soil.
What to do: Improve drainage by amending the surrounding soil with organic matter or creating a slight mound to elevate the root crown. Avoid overwatering and allow the top 3 inches of soil to dry out.
Overwatering
PossibleHow to tell: The tree appears weak and the leaves drop prematurely despite frequent watering. The roots may look mushy or dark instead of firm and light colored.
What to do: Adjust your watering schedule to every 7 to 14 days. Ensure the soil is moist but never waterlogged.
Find out what's wrong with your eastern cottonwood
The list above covers the usual causes. Pocket Botanist looks at a photo of your actual plant and tells you the likely cause, how serious it is, and what to try first. Identification and a health check are free.
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When to worry
Root rot is serious if the tree is losing large amounts of foliage or if the trunk base feels soft. It is often too late if the entire root system has decayed.
Stopping it coming back
Plant in well draining soil and avoid watering the base of the trunk directly.
Eastern Cottonwood: root rot? Check yours with a photo
Every plant is a little different. Take a photo of your eastern cottonwood and Pocket Botanist tells you which cause is most likely, how serious it is, and what to try first. A few checks a day are free. Save the plant and you get care reminders timed for it.
Scan with your phone's camera to get the app
Or go to pocketbotanist.app/get on your phone
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Questions people ask
- Can I save a tree with root rot?
- If caught early, you can save the tree by correcting the drainage and reducing water. If the rot has reached the trunk, the tree may not survive.
- Do I need to use a fungicide?
- Fungicides are rarely effective for established trees. Improving the soil environment is the best way to manage the issue.
More problems with Eastern Cottonwood
Back to the Eastern Cottonwood guide
This article was generated with AI on from the plant’s care profile and is general information, not horticultural advice. Read about how we build these guides.